[CQ] Problem in MP C 2011

[AjitN]

Team
Enclosed files for your ref.

We are getting faint bands on copy / prints as shown in image 1 & 2. Those samples are after replacement of PTR. One is with earthing strip and second is without earthing.
(3) Image on belt is OK without any problem. Image (4) shows Calibration sheet with problem.

All color bands are very similar in distance (when placed & aligned to each other).
This has happened during print run of 300 thick 4 paper.

Since this is in all the colors, I think it could be HVPS, LVPS Or Main Board.

Has anybody faced this problem? Please suggest how to proceed for isolation of this problem.

Regards & thanks in advance

[Phil B.]

Re: Problem in MP C 2011

ya think it might be related to the PCR change you mentioned? hmmm


back trace your steps

[luca72]

Re: Problem in MP C 2011

ya think it might be related to the PCR change you mentioned? hmmm


back trace your steps

if I understood correctly before replacing the PTR there was no problem? too little information, if it looks like something out of place / not hooked up well, check again scrupulously, have you tried to reassemble the old one? what was the problem before?

[luca72]

Re: Problem in MP C 2011

Team
Enclosed files for your ref.

We are getting faint bands on copy / prints as shown in image 1 & 2. Those samples are after replacement of PTR. One is with earthing strip and second is without earthing.
(3) Image on belt is OK without any problem. Image (4) shows Calibration sheet with problem.

All color bands are very similar in distance (when placed & aligned to each other).
This has happened during print run of 300 thick 4 paper.

Since this is in all the colors, I think it could be HVPS, LVPS Or Main Board.

Has anybody faced this problem? Please suggest how to proceed for isolation of this problem.

Regards & thanks in advance

if I understood correctly before replacing the PTR there was no problem? too little information, if it looks like something out of place / not hooked up well, check again scrupulously, have you tried to reassemble the old one? what was the problem before?

[AjitN]

Re: Problem in MP C 2011

if I understood correctly before replacing the PTR there was no problem? too little information, if it looks like something out of place / not hooked up well, check again scrupulously, have you tried to reassemble the old one? what was the problem before?

Sir
All the time problem is same, Before & after replacement of PTR ( Replaced only for that problem).
With earthing & without earthing. Checked all boards for physical damage.
Could not trace anything & do not know how to proceed further.

Any suggestion will be highly appreciated.

[keithxxiii]

Re: Problem in MP C 2011

You mentioned it happened while printing thick 4. I trust that you have changed the paper settings correctly. Does it happen on a normal 80gsm paper? It's a long shot, but have you updated all firmwares?

[AjitN]

Re: Problem in MP C 2011

You mentioned it happened while printing thick 4. I trust that you have changed the paper settings correctly. Does it happen on a normal 80gsm paper? It's a long shot, but have you updated all firmwares?

Sir
Settings are OK (Set for thick 4 only ). On all media it is same, copy as well as prints. Scanning is OK.
No I have not updated Firmware. I feel, possibly wrong, that it should be some hardware problem only. Scanning is OK & problem started during print run.

Thanks for suggestion, but I would like to ensure hardware part is OK before trying Firmware. It could be too messy if anything goes wrong.

Best Regards

[luca72]

Re: Problem in MP C 2011

Sir
All the time problem is same, Before & after replacement of PTR ( Replaced only for that problem).
With earthing & without earthing. Checked all boards for physical damage.
Could not trace anything & do not know how to proceed further.

Any suggestion will be highly appreciated.

hello, not knowing the history pm of that machine, and comparing the problem with those that happen to me on that model, I ask you: what percentage of life have reached the pcdu? (pm counter print-out) was some pcu replaced? Was the plastic cover with the ground behind the pcu (D147-3494) remembered to put it from the old one to the new one? are the ground contacts inside the cover deformed?



the first pcu versions had the ball bearings on the drum cylinder that created a lot of problems, now they have a bushing, check this

[AjitN]

Re: Problem in MP C 2011

hello, not knowing the history pm of that machine, and comparing the problem with those that happen to me on that model, I ask you: what percentage of life have reached the pcdu? (pm counter print-out) was some pcu replaced? Was the plastic cover with the ground behind the pcu (D147-3494) remembered to put it from the old one to the new one? are the ground contacts inside the cover deformed?



the first pcu versions had the ball bearings on the drum cylinder that created a lot of problems, now they have a bushing, check this

Sir
First it started suddenly during print run. Secondly all colors are showing same problem & repeats at exactly same interval.
So I think there must be something else which is common & creating problem

[Phil B.]

Re: Problem in MP C 2011

Sir
First it started suddenly during print run. Secondly all colors are showing same problem & repeats at exactly same interval.
So I think there must be something else which is common & creating problem

so from all colors...

same spacing of defect all color.. ( what does the defect ruler tell you about the spacing )?

ITB 'looks good' could the rollers be getting bad charge/flat spotted?

contacts on drums-dev-belt all in good clean condition?

could nip ( if it has one ) be sticking/jammed in fuser?

what is life on consumables? ( heavy paper = greater wear/tear )

clicking or scrubbing sounds?

[luca72]

Re: Problem in MP C 2011

Team
Enclosed files for your ref.

We are getting faint bands on copy / prints as shown in image 1 & 2. Those samples are after replacement of PTR. One is with earthing strip and second is without earthing.
(3) Image on belt is OK without any problem. Image (4) shows Calibration sheet with problem.

All color bands are very similar in distance (when placed & aligned to each other).
This has happened during print run of 300 thick 4 paper.

Since this is in all the colors, I think it could be HVPS, LVPS Or Main Board.

Has anybody faced this problem? Please suggest how to proceed for isolation of this problem.

Regards & thanks in advance

I have analyzed better your problem, try enter sp mode (you know how it is?) perform sp 5-804-140 and listen if you hear the sound of the ptr-itb contact-belt motor, and then open the duplex and activate the switches with your fingers or a piece of cardboard, use again 5-804-140 sp and observe the drive mechanism and carefully check with a LED light that there are no mechanical problems in the operation of the contact of the ptr group, it is all plastic could be broken something (though it may rarely have broken / unhooked anything)

SP-5-804-140 OUTPUT CHECK PTR MOTOR - MOVE CLOCKWISE
SP-5-804-141 OUTPUT CHECK PTR MOTOR - MOVE COUNTER-CLOCKWISE

SP 5-803-028 INPUT CHECK PTR SWITCH OPEN/CLOSE - 0=OPEN 1=CLOSE
SP 5-803-030 INPUT CHECK ITB-PTR CONTACT CHECK - 0=NEAR 1-FAR

if you resolve , say that..i hope i was helpful, regard

[AjitN]

Re: Problem in MP C 2011

I have analyzed better your problem,

Sir
Thank you for your suggestions.
I will check & definitely get back to you.

Best Regards & Thanks

[FrohnB]

Re: Problem in MP C 2011

Need Counters for PCDU units and ITB unit. I would be looking at the ITB unit FIRST and FOREMOST, since you say that it happens on all colors. PLUS the 2nd picture you provided shows that the magenta calibration strip is no good on ITB belt. The only thing in the machine that all the CMYK units "share" is the ITB (aside from PTR and Fuser, BUT...you get my point). WIth all the colors exhibiting the same issue, I can almost guarantee that it's the ITB unit. Have had to replace the transfer rollers (4) inside that unit before (but for a different issue), but I would just shoot for a complete unit (or swap one from a known working machine to test).

Again, need to know the life of units in this machine.
Also, the fact that it's "Thick 4" paper you're using, will lead to yields that are less than what's stated in the manual.

[AjitN]

Re: Problem in MP C 2011

Need Counters for PCDU units and ITB unit..........

Sir
I agree with you but try to understand that no machine with any counters on PCDU OR ITB OR Fixing will suddenly start giving such typical same problem in all colors , with such equi-distance pattern. This is some thing else, either corrupt firmware OR some mechanical obstruction which is giving this uni-distance pattern. This is what I feel so.

Any way thanks for suggestions & I will check
Regards

[slimslob]

Re: Problem in MP C 2011

Need Counters for PCDU units and ITB unit.

Try SP 7803 PM Counter Display

Sir
I agree with you but try to understand that no machine with any counters on PCDU OR ITB OR Fixing will suddenly start giving such typical same problem in all colors , with such equi-distance pattern. This is some thing else, either corrupt firmware OR some mechanical obstruction which is giving this uni-distance pattern. This is what I feel so.

But the PM Counters will give you a definite starting point. That is provided that you replace parts when recommended and reset the associated PM counter. If you do not reset the counter, the next tech to work on the machine will have no idea when they were replaced.